VMware, Inc.
Adaptive rate limiting of flow probes

Abstract:

A technique for performing adaptive rate limiting of flow probes is described. The technique includes sending a plurality of flow probes from a first service engine to at least one other service engine. The flow probes are sent at a rate that does not exceed a rate limit. A flow probe of the plurality of flow probes is generated in response to the first service engine receiving a mid-flow packet for a flow that is not recognized by the first service engine. A recipient service engine of the flow probe responds with a success indicator if the recipient service engine recognizes the flow. The technique also includes determining a success rate associated with success indicators received from the at least one other service engine and comparing the success rate with a first threshold. The rate limit is adjusted in response to a comparison result.